- 122 -Replacing Consumables and Maintenance Units4 4. MaintenanceReplacing the Belt UnitLife Span of Belt UnitWhen the “Belt Unit Near Life” messageappears on the display screen, prepare areplacement belt unit. You can keep printingapproximately 1000 pages until the nextmessage appears.When the “Change Belt Unit” messageappears, replace the belt unit.The life expectancy of the belt unit isapproximately 80,000 pages for A4 simplexprinting (three pages per job).Note● The actual number of pages you can print with the beltunit depends on how you use it.Note● Though opening and closing the top cover may extendthe life of the belt unit somewhat, you should replace itsoon after the “Change Belt Unit” is displayed to preventmalfunction.● If you replace the belt unit, use it until the end of itsuseable life. If you remove the belt unit and install anduse another one before its usable life has expired, the uselife will not be correctly displayed.● When the <ENTER> button > [Admin Setup] >[System Setup] > [Near Life Status] is set to[Disable], the [Belt Unit Near Life] message does notappear.Procedure for ReplacementNote● The image drum (the green tube) is very delicate. Handleit carefully.● Do not expose the image drum to direct sunlight or verybright interior light (approximately more than 1500 lux).Even under the normal interior light, do not leave it formore than 5 minutes.1 Prepare a replacement belt unit.2 Turn off your printer by pressing thepower switch.Reference● “Turning Off the Power” P.223 Insert your finger into the recess onthe right side of the printer and pull thefront cover open lever (1) to open thefront cover (2) forward.124 Press the top cover open button (3) andopen the top cover (4).CAUTION Possible to getburned.● The fuser unit is extremely hot. Do not touchit.345 Take all the four image drums out of aprinter, and then place them on a flatsurface.